Preparation method of dispersion strengthened copper and oxygen-free copper composite bars

A dispersion-strengthened copper and oxygen-free copper technology, which is applied in metal processing equipment, transportation and packaging, etc., can solve the problems that no dispersion-strengthened copper and oxygen-free copper are combined to prepare composite rods, and achieve high strength and high temperature softening resistance Strong ability and good brazing performance

Active Publication Date: 2018-05-22
中铝洛阳铜加工有限公司
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Problems solved by technology

[0008] At present, there are dozens of patents related to dispersed copper in China, and most of the related dispersion-strengthened copper preparation technologies adopt short-process preparation technologies, but no technology has been found to prepare dispersion-strengthened copper and oxygen-free copper into composite rods; how to pass Powder metallurgy and pressure processing technology, composite Cu-Al2O3 nano-dispersion strengthened copper and oxygen-free copper, prepare Cu-Al2O3 nano-dispersion strengthened copper and oxygen-free copper composite rod, improve dispersion strengthened copper and oxygen-free copper composite rod The comprehensive performance has become a technical problem that has been difficult to solve for a long time

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  • Preparation method of dispersion strengthened copper and oxygen-free copper composite bars

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Embodiment 1

[0031] A composite rod of dispersion-strengthened copper and oxygen-free copper used for the external cavity of microwave tube;

[0032] The first step, nitrogen atomization powder making: use a 100kg intermediate frequency melting furnace for melting, first add high-purity oxygen-free electric copper to the intermediate frequency melting furnace for 40 to 70 minutes, cover the melting process with charcoal; then add Cu-P alloy for deoxidation 0.5-3 minutes, the proportion of Cu in Cu-P alloy is 86-88%, the proportion of P in Cu-P alloy is 11-15%, then add Cu-Al alloy and smelt for 3-8 minutes, the Cu-Al alloy The proportion of Cu is 69-71%, the proportion of Al in the Cu-Al alloy is 28-32%, the content of Al in the Cu-Al alloy is controlled at 0.09-0.14wt%, and then the mist is carried out with nitrogen gas at a pressure of 0.7-1.0Mpa. Chemical powdering, drying and sieving to obtain -100 mesh Cu-Al alloy raw powder;

[0033]The second step, preparation of oxygen source: sie...

Embodiment 2

[0047] A composite rod made of dispersion-strengthened copper and oxygen-free copper for high-current high-voltage relay contacts of new energy vehicles;

[0048] The first step, nitrogen atomization powder making: use a 100kg intermediate frequency melting furnace for melting, first add high-purity oxygen-free electric copper to the intermediate frequency melting furnace for 40 to 70 minutes, cover the melting process with charcoal; then add Cu-P alloy for deoxidation 0.5-3 minutes, the proportion of Cu in Cu-P alloy is 86-88%, the proportion of P in Cu-P alloy is 11-15%, then add Cu-Al alloy and smelt for 3-8 minutes, the Cu-Al alloy The proportion of Cu is 69-71%, the proportion of Al in the Cu-Al alloy is 28-32%, the content of Al in the Cu-Al alloy is controlled at 0.56-0.67wt%, and then the mist is carried out with nitrogen gas at a pressure of 0.7-1.0Mpa. Chemical powdering, drying and sieving to obtain -100 mesh Cu-Al alloy raw powder;

[0049] The second step, prepar...

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Abstract

The invention relates to a preparation method of dispersion strengthened copper and oxygen-free copper composite bars. The preparation method comprises the preparation process steps of nitrogen atomizing powdering, oxygen source preparation, powder mixing, cold isostatic pressing machining, the short flow path, integrated heat treatment, squeezing machining, finishing and decrustation, preparationof dispersion strengthened copper and oxygen-free copper composite copper ingots, secondary squeezing of the dispersion strengthened copper and oxygen-free copper composite copper ingots, stretchingmachining of the dispersion strengthened copper and oxygen-free copper composite bars, and checking and detecting. Through a powder metallurgy and pressure machining technology, Cu-Al2O3 nano dispersion strengthened copper and oxygen-free copper are composited to be prepared into the Cu-Al2O3 nano dispersion strengthened copper and oxygen-free copper composite bars, through the high-temperature, high-strength and high-grade oxygen-free copper characteristic of the Cu-Al2O3 nano dispersion strengthened copper, the requirements of large-power microwave tubes in the electronic information industry, large-current high-voltage relays in the electrical industry and the like for key materials are met.

Description

technical field [0001] The invention relates to the fields of powder metallurgy and non-ferrous metal processing, in particular to a method for preparing a dispersion-strengthened copper and oxygen-free copper composite rod. Background technique [0002] Dispersion strengthening is a method of strengthening the material by introducing stable, uniform, and fine oxide material points into the metal matrix, pinning dislocations, grain boundaries, and subgrain boundaries, and hindering the movement of dislocations; Small and uniform oxide spots are dispersed in the medium, which has high strength and high softening temperature; at the same time, the fine and dispersed oxide spots will not adversely affect the electrical and thermal conductivity of the copper alloy itself, so that the dispersion strengthened copper can improve the strength. At the same time, it can maintain its own excellent electrical and thermal conductivity; therefore, dispersion-strengthened copper is the cop...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B21C37/04B22F9/08B22F1/00B22F3/04B22F3/10B22F3/24
CPCB22F1/0003B21C37/04B22F3/04B22F3/1017B22F3/24B22F9/082B22F2998/10B22F1/145
Inventor 牛立业曹先杰郭慧稳李欣华郭惠祥袁新民
Owner 中铝洛阳铜加工有限公司
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